Valve for internal combustion engines



April 25, 1933. w B YC 1,905,140

VALVE FOR INTERNAL COMBUSTION ENGINES Filed June 10, 1932 Patented Apr. 25, 1 933 I I l V UNITED STATES PATENT OFFICE,

WILLIAM FREDERICK BOYCE, OF TORONTO, ONTARIO, CANADA VALVE FOR INTERNAL COMBUSTION ENGINES Application filed June 10, 1932, Serial No. 616,429, and in Canada May 12, 1932.

The invention appertains in particular to crank mechanism dia rammatically indivalves for internal combustion engines and cated at 10. The crank mechanism is conessentially concerns a hollow cylindrical nected to the valve by means of the boss 11 valve reciprocably disposed in an engine to at the lower end 12, which boss is pierced to control its ports. In this type of valve there receive a pin or the like.

is a passage for the gases that is brought The valve is chambered at 13, the chamber into communication with a port or ports by of which extends longitudinally for nearly longitudinal movement of the valve imparted the entire length of the valve. An opening to it by crank mechanism. This valve while 14 communicates with the lower end of the possessed of certain salutary features over chamber, While a plurality of circumposed other types, nevertheless has the objection openings 15 communicate with the upper end that pressure on the valve top due to exploof the same. The lower opening forms an. sions or firing is transmitted to the crank ingress for the gaseous mixture and the mechanism that operates it. Furthermore upper openings constitute an egress when the 15 the burning gases are inclinedito attack the valve is employed as an intake for the'ex- 65 upper space between the wall of the valve plosive mixture. and the wall of the bore in which it slides. When the valve is raised the ingress is in The gases destroy the lubrication and cause register with the port 16, and the upper opencarbon deposits on the bearing surface which ings communicate with the head space 17 of lessens the engines efliciency. the cylinder. In this manner an admixture 70 According to the present invention it is of gases is admitted to the cylinder head. proposed to provide an annular shoulder Conversely, the exhaust valve would operate which not only relieves the crank mechanism to discharge the gases. by taking the impact of the explosion but An annular shoulder 18 is provided at the also seals off the bearin surface of the valve top of the valve and has a face 19 that seats at the time of each exp osion, i. e., when the on the face 20 of the cylinder in the closed valve is closed. This materially increases the position of the valve. The shoulder seals off efficiency of the valve without appreciably the entrance to the bearing surface 21 of adding to its cost of manufacture. the valve to preclude gases adversely affect- Referring to the accompanying drawing, ing the same. Additionally the shoulder Figure l is a vertical sectional view through takes the pressure of the explosion ofi the the cylinder of an internal'combustion encrank mechanism, and for this purpose need gine showing the invention applied thereto. not be located at the upper end of the valve.

Figure 2 is a longitudinal sectional view What I claim is through the valve. In a valve structure of the class described, 85

In the drawing the reference numeral 3 an engine cylinder having a valve bore comgenerally denotes the usual cylinder of an municating with the head space and a port internal combustion engine. The cylinder communicating with the bore, a cylindrical may be of conventional character and of valve reciprocably disposed in said bore, said sin le or multiple bore. It may be water valve being chambered longitudinally and coo ed as shown or air cooled according to having openings at each end of its chamber the desi n of engine. communicating with its cylindrical surface,

The %ore 4 accommodates the piston 5 and an annular shoulder at the top of the which has the usual rings 6 and is connected valve for seating against a surface of the to the rod 7 of the crankshaft. The crankhead space to seal off the bearing surface shaft is not shown since it does not form a of the valve therefrom. part of the present invention. Signed at Toronto, Ontario, Canada, this In performing this invention there is pro- 1st day of June, 1932. vided a hollow cylindrical valve 8 reciprocably disposed in the bore 9 and actuated by d WILLIAM FREDERICK BOYCE. W 

